没有布局管理器的响应式JFrame

Question

我试图做两个按钮JFrame,我调用setBounds它们的方法来设置它们的位置和大小,我也传递null给setLayout1 because I want to use组件的setBounds`方法.

现在我想用我的代码做一些事情,每当我调整框架按钮时,装饰将以适当的形式改变,如下面的图片:

我知道可以使用从JPanel类中创建一个对象并向其添加按钮,最后将创建的面板对象添加到框架中,但由于某种原因(由教授指定),我现在不允许这样做.

有什么办法或者你有什么建议吗？

我的代码是这样的:

public class Responsive
{
    public static void main(String[] args)
    {
        JFrame jFrame = new JFrame("Responsive JFrame");
        jFrame.setLayout(null);
        jFrame.setBounds(0,0,400,300);

        JButton jButton1 = new JButton("button 1");
        JButton jButton2 = new JButton("button 2");

        jButton1.setBounds(50,50,100,100);
        jButton2.setBounds(150,50,100,100);

        jFrame.add(jButton1);
        jFrame.add(jButton2);

        jFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        jFrame.setVisible(true);
    }
}

Answer 1

A FlowLayout没有水平间距,一些垂直间距和大边框可以轻松实现.一个null布局管理器是永远的答案,"响应"稳健的GUI.

import java.awt.*;
import javax.swing.*;
import javax.swing.border.EmptyBorder;

public class ResponsiveGUI {

    private JComponent ui = null;

    ResponsiveGUI() {
        initUI();
    }

    public void initUI() {
        if (ui!=null) return;

        ui = new JPanel(new FlowLayout(FlowLayout.CENTER, 0, 8));
        ui.setBorder(new EmptyBorder(10,40,10,40));

        for (int i=1; i<3; i++) {
            ui.add(getBigButton(i));
        }
    }

    public JComponent getUI() {
        return ui;
    }

    private final JButton getBigButton(int number) {
        JButton b = new JButton("Button " + number);
        int pad = 20;
        b.setMargin(new Insets(pad, pad, pad, pad));

        return b;
    }

    public static void main(String[] args) {
        Runnable r = new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (Exception useDefault) {
                }
                ResponsiveGUI o = new ResponsiveGUI();

                JFrame f = new JFrame("Responsive GUI");
                f.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
                f.setLocationByPlatform(true);

                f.setContentPane(o.getUI());
                f.pack();

                f.setVisible(true);
            }
        };
        SwingUtilities.invokeLater(r);
    }
}